The ultrasound structure of the udder in sheep was evaluated as a tool for monitoring mammary health and its relationship with the productive performance of the progeny. Twenty-two females and their respective offspring were randomly selected. An ultrasound evaluation and the Image J® 1480 program were performed for image analysis. In the udders, the type of tissue, consistency and presence of abscesses were measured. Body condition score, age and breed type were recorded in the dams, and birth weight, weaning weight and daily weight gain were recorded in lambs. The information was evaluated through analysis of variance, correlation analysis and multiple regression. A significative effect was found in the number of pixels per ultrasound slice (p<0.05), with the highest number of pixels in parenchyma and soft tissue. Effect of age and breed type on the number of pixels was observed. T...